Finding the Third Proportional to 12,439 and 25,310

Step by Step Solution

1. Step 1: Write the proportion equation
   12,439 : 25,310 = 25,310 : x
2. Step 2: Convert to fraction form
   12,439/25,310 = 25,310/x
3. Step 3: Cross multiply
   12,439x = 25,310 × 25,310
4. Step 4: Simplify right side
   12,439x = 640,596,100
5. Step 5: Solve for x
   x = 640,596,100/12,439
6. Step 6: Final answer
   x = 51,499.00